add forum question and link to my git repo

doc/forum/Howto_add_tag_from_plugin_code.mdwn

@@ -0,0 +1,12 @@
+Hi, I want to add tags to some pages automatically (generating album images 
+and want to tag all generated pages). I managed to do so in following way:
+
+    IkiWiki::Plugin::tag::preprocess_tag(
+        page => $viewer,
+        destpage => $params{destpage},
+        map { ($_ => 1) } @tags,
+    );
+
+This works, however if some tag does not exist, it is not created. I tracked it so far that I found that the Render.pm's method gen_autofile() is not called , so it is most likely that I need to somehow trigger Render.pm's refresh()...but how can I do it?
+
+BTW: The code is modified album plugin that is in [my git](https://github.com/llipavsky/ikiwiki) 

doc/git.mdwn

@@ -77,6 +77,7 @@ think about merging them. This is recommended. :-)
 * [[anarcat]] `git://src.anarcat.ath.cx/ikiwiki`
 * anderbubble `git://civilfritz.net/ikiwiki.git`
 * frioux `git://github.com/frioux/ikiwiki`
+* llipavsky `git://github.com/llipavsky/ikiwiki`
 
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